| Castle Rock to Clermont (Florida) | 1,516.27 mi (2,440.20 km) |
| Castle Rock to Cleveland (Mississippi) | 873.80 mi (1,406.25 km) |
| Castle Rock to Cleveland (Ohio) | 1,223.71 mi (1,969.38 km) |
| Castle Rock to Cleveland (Tennessee) | 1,133.54 mi (1,824.26 km) |
| Castle Rock to Cleveland Heights (Ohio) | 1,229.73 mi (1,979.05 km) |
| Castle Rock to Cliffside Park (New Jersey) | 1,625.92 mi (2,616.66 km) |
| Castle Rock to Clifton (Colorado) | 194.15 mi (312.46 km) |
| Castle Rock to Clifton (New Jersey) | 1,616.79 mi (2,601.97 km) |
| Castle Rock to Clinton (Iowa) | 784.14 mi (1,261.95 km) |
| Castle Rock to Clinton (Maryland) | 1,493.93 mi (2,404.24 km) |
| Castle Rock to Clinton (Mississippi) | 944.70 mi (1,520.34 km) |
| Castle Rock to Clinton (Utah) | 399.17 mi (642.41 km) |
| Castle Rock to Clive (Iowa) | 600.64 mi (966.63 km) |
| Castle Rock to Cloquet (Minnesota) | 802.81 mi (1,292.00 km) |
| Castle Rock to Cloverleaf (Texas) | 860.35 mi (1,384.60 km) |
